I honestly don't understand why (barring greater fool theory/delusion/etc.) Uber's new CEO didn't just say that prices had to go up 50%-100% (to basically cab fares) to create a sustainable business. It is a better service in many cases after all. If you're not interested in using the service at those prices? Sorry. We don't want you as a customer.
There would have been howls of rage from young urbanites who had structured their lives around subsidized transportation. But...
Lyft could have contested this but I'm not sure it would have been credible.